Carl Sagan's birthday is November 9. He would have been 77 in 2011.
Carl Sagan was a Professor of Astronomy and Space Science and Director of the Laboratory for Planetary Studies at Cornell University. He served as an advisor and consultant to NASA, and played a major role in the establishment of SETI (Search for Extraterrestrial Intelligence). He was a Pulitzer Prize winning author and most familiar to the public through his COSMOS series on PBS. In addition to numerous awards, recognitions and honorary degrees for his outstanding contributions, he is acknowledged as one of the most effective public faces of astronomy and space science throughout the world. Sagan died in December 1996.
How are you going to celebrate Carl Sagan Day in 2011?
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.----Carl Sagan, 1987 CSICOP Keynote Address